Portable boring machine



J. STAEMPFLI PORTABLE BORING MACHINE Original Filed July 16 1920 2Sheets-Sheet b a; h

' t v III iiiiiiiiiiiil i will:

Apr. 17, 1923. 1,452,320

J. STAEMPFLI PORTABLE BORING MACHINE I Original Filed Jul. 16, 1920 2Sheets-Sheet 2 Patented Apr. 17, 1923.

UNITED srnras 1,452,320 PATENT orrica.

JOSEPH srnnmrrm, or nEwonLaANs; LOUISIANA.

PORTABLE BORING MACHINE.

Application filed July 16, 1920, Serial N0. 396,636. Renewed March 3,1923.

T all to 710m z'tmay concern:

Be it known that I, JOSEPH STAEMPFLI, a citizen of the United States,residing at New Orleans, in the parish of Orleans and :State 6 ofLouisiana, have invented certain new and useful Improvements 'inPortable Boring Machines, of which the following is a specification. a i

This invention relates to boring machines andparticularly to that classof boring machines known as portable boring machines.

Ari-object of my invention is the provision of a portable boring machinewhich may be quickly set up on the bed of a radial drill press and whenso, set up can be adjusted at either end in both horizontal and verticalplanes and by a single adjusting element for each adjustment.

Another object of my invention is the provision of such a portableboring machine which may be set up on the work itself such as on alocomotive or ships frame or hull and which may after being set up, beindependently adjusted at either end of the bormany positions as long asthe shaft is in a certain plane perpendicular to the axis of the boringbar or shaft.

Another andfurther object of my invention is the provision of such aportable boring machine having a boring barywhich while it is adjustableat either end by simple adjusting means, has bearings which run trueregardless of the adjustment.

Another and still further object of my invention is the provision ofsuch a portable boring machine having a boring bar provided with anadjustment providing for the boring of tapered holes.

Another and still further object ofinyinvention is the provision of sucha portable boring machine, which after being set up on a piece of work,can bore a ,holehaving a ing bar or shaft and in both thehorizontalportion cylindrical, and one or moreportions tapered withoutre-s'etting up the machine andby merely re-setting the taper adjustment.I

Referring to the drawings wherein a preferred embodiment of my inventionis illustrated, I

Figure I is a side elevation sectional view showing the and supports insection.

Fig. 1 isa cross sectionon' the line AA of Fig. 1. I

Fig. 2 is a fragmental view of the shaft or bar showing the middleportion of the bar broken away. j

Fig. 3 is an end elevation view of the right hand adjustable supportshown in 'Fig. 1.

Fig. 4 is a detail View of thegear connectionsin the reduced or slowspeed gear drive of theboring bar. I

Fig. 5 is an'end elevationof the swinging drive head of the drivingmechanism.

F ig. 6 is asectional' view on the line-66 of Fig. 1.

Fig. 7 is an end elevation of the boring bar when removed from itsbearing, and showing the taper segment and the star wheel for operatingthe'boring bar feed.

Like reference characters refer to similar parts throughout the severalviews.

The supporting and adjusting means for each end of the bar are similarin construction' and operation and the similar parts will therefore bereferred to by the same reference characters.

10 designates supporting members which are provided with vertical guides11'- (see Fig. 3) on which the vertical carriage 12' travels; In thevertical portion of the sup ports 10 are slotslB which are parallel tosupport 10 is an ear 15having threaded hole in which is anadjustingscrew 16 having a squared end 17 and having reduced portion1'8'securediinan ear 1-9 integral with the vertical carriage 12. When.it is desired} to adjust either vertical earriageQthe bolts 14-. areloosened, a suitable wrench ap-Y plied to the squared end 17 and thescrew is then turned to raise or lower the vertical carriage 12-;untilthe desired point is horizontal guides upon which travels thehorizontally movable carriage 21. This carriage 21 is provided withslots 22 whlch are parallel to the guides 20. Through the slots 22 andthreaded in the vertical carriage 12 are the bolts 23. The carriage 21is provided with an ear 24- in which is mounted one end of anadjust-ngscrew 25 similar in construction to the adjusting screw 16. Theend of the screw 25 is mounted in the ear 24 similar to thecorresponding end of the screw 16 in the ear 19, and so as to revolvewith relation to the bearing in the car 19 but without having any axialmovement with relation to the ear. The screw 25 is threaded and passesthrough a threaded bearing in the lug 26 which. is integral with thevertical carriage 12. The screw 25 has a squared end 27 by which it maybe turned by a suitable wrench. 'W'hen it is desired to adjust the endsof the boring bar in a horizontal plane the nuts 23 are first loosened.The adjusting screws 25 are now utilized to place the horizontalcarriages in the proper posit ons to locate the ends of the boring barin the correct place. The screws 23 are nowtightened.

During these vertical and horizontal movements. the relation of theboring bar to the supports 10, changes. I will now describe thestructure which permits this change without disturbing the bar or shaftin its bearings.

The boring bar or shaft is designated as 30. At the right end of thebar, as illustrated in Figs. 1 and 2, is a hinge joint connection 31composed of a hinge member integral with the bar and anothercomplementary hinge member integral with the bearing. member 32. Thishinge joint is held tight bv a bolt 33 and nut 34. The bearing member 32is journaled in a journal member 35 having a spherical bearing on itsouter side and designated by 36.

At the other end of the boring bar is a segment 37 which has a slot 38described about the center of the hinge 31 as a center, and in a planeperpendicular to the axis of the said hinge connection. The bar 30 has atongue 39 inserted in a correspondingly constructed groove 1-0 in thesegment 37. The tongue 39 is provided with a hole in which is mounted abolt 41 having a head 42. On the end of the bolt 41 is a nut- 13 bymeans of which the tongue 39 can be held securely in the segment 37.

The segment 37 is provided with a bearing shaft member 4 1 which isjournaled in a journal member 45 shown in Fig. l. The journal member 45is longer than the journai member at the other end of the bor ing barsince it has to carry the driving mechan sm of the boring bar. Themember 45 has a spherical surface 16 which provides universal movementof the boring bar to be later described.

Mounted on each horizontal carriage 21 is a plate 4C7 which is spacedfrom the carriage 21 and is secured in place by the stud bolts 18.

The carriages 21 and their respective plates 47 have complen'ientarypart-spherical bearings as shown at each end of the shaft. The carriage21 and plate 1-7 at the left in Fig. 1 cooperate with the sphericalportion 46 of the member 4C5 while the carriage 21 and plate 1-7 at theright of Fig. 1 cooperate with the spherical bearing portion 36 of thejournal member 35. During adjustment of the boringbar by meansoi' thevertical and horizontal carriages, movement of the spherical bearingmembers 36 and 46 takes place within their respective bearing members.However, during the process of boring, the shaft portions 414- and 32turn within the members 15 and 35 respectively. The tightness of thespherical parts 36 and 16 within their respective bearings is controlledby the bolts 18 which may be tightened or loosened as desired.

Adjacent the spherical bearing portion 46 the journal member &5 has anoil groove 19, connected by an opening 49 to the opening in which theshaft 4% is journaled. Surrounding the end of the journal meu'iber 15 abushing 50, which provides a bearing for the sleeve 51 which latter isprovided with, a flange carrying the bevel gear 52. An oil groove F0 isformed in the outer surface of the bushing 50, and the bushing 50 andsleeve 51' are formed with oil holes 50 and 51 respectively so thatlubricant can pass from the interior of the gear casing to the journaledportion of the shaft 44. The shaft 441 is provided with a square portionon which is mounted a plate 54; having lugs 55 engaging recesses 56sleeve 51 (see l igure 5).

Seated in an annular groove in the journal member 45 is a suitablebearing 57 which is suitably secured to the back plate 58 of the gearbox. Secured to the back plate 58, by the bolts 59, is a block 60.Extending around near the periphery of the back plate 58 and abuttingthe sides of the block 60 is a ring 61 (Fig. 1) forming the sides of thegear" box. Attached to the block 60 and the ring 61 is the front plate62. Bolts 63 secure the front and back plates to the ring 61. Stud bolts64: are provided to secure the front plate to the block 60.

Bolted tofthe end of the journal member 45 by the bolts 65 is a plate66. This plate 66 retains the bushing 50 in place. I

The block 60 is provided with a bearing opening in which is a bushing67. \Vithin in the in some places, the shank 73 would be inac-,

the bushing 67 is journaled a driving. shaft 68 having suitable meansfor limiting the downward movement, as a collar 69. Keyed to the innerend of the shaft 68 is a bevel.

gear 70 which meshes with the bevel gear 52. The extreme inner end ofthe shaft 68 is provided with a threaded, portion which is engaged. by anut 71. The nut 71 secures the gear 70 on the shaft 68. On the outer endof the shaft 68 is a shank 72 which may be operated by a drill press orby the ordinary air motor. Another shank 73 ,is provided on the shaftport-ion M and is. used similarly to the shank 7 2' when a directconnection is desired. due to the relative size of the gears 70, and 52,a slower driving of the shaft &4 is obtained by the use of the shank 72.It will also be noted that due to the construction of the gear box andits bearing, the same may be turned at almost anyangle relative to theshaft 44 and in a plane perpendicular thereto. This feature is veryuseful since cessible, and the shank 72 would also be inaccessible ,insome positions.

The boring bar 30 isprovided withv a groove 73 in which is mounted afeeding screw Tet which is journaled at its ends in any well known orsuitable manner. At the left end of the screw 74 is a universal joint 75which is connected to the shaft 76.- On the end. of the shaft 76, whichis journaled in the nut-(l2, is a star wheel 77. When the boring barrevolves, the star wheel 77 engages a suitable projection 77 which is adjustubly secured to a stationary part of the frame. This turns the starwheel 77 one point at the end of-each revolution to operate the feed barto move the tool carriage 78 which carries the tool 7 9. Any ,well knownor suitable means may be provided to give the tool 7 9 radial movementbefore beginning a new cut.

In setting up my portable boring machine, preliminary adjustments of thevertical and horizontal carriages may be made sothat when the machine isset 11 with relation to the work, only smallad ustments will benecessary. The machine is now set up with relation toothe work, the lefthand support and its attachments being slipped off. the shaft portion 32in order to getthe bar 30 in place. When assembled in approximately thecorrect position the short portions of the supports 10 are clamped tothe drill press, locomotive frame, ships hull, or other solidsupport bymeans of clamps, utilizing if desirable the holes 91 for the passage ofsecuring bolts. Accurate adjustments of the carriages, as alreadydescribed, is now accomplished. The tool carriage 7 8 is drawn to oneend and set to begin its out. The projection 77 a for operating the starwheel 7 7 is set in position to be engaged by the same It will be notedthat as I it revolves.. :Powerisnow. applied to either of the shanks 7 2or 7 8 and the machine I is ready.to.operate.- l

If it is desired to cut a tapered hole the nuts 43 and 3-1 maybe"loosened and the left end 39' of. the bar 30 maybe swung in the slot 30to the desired place after which the I out departingfrom the spirit ofmy inven:

tion and: withinthe scope of the appended claims. I

Having described myinvention what I claim is:

1. In a portable boring machine, a boring bar provided 'with a shaftportion at each end, independentlyadjustable supports for each end ofthe bar, and a ball and socket joint connection between each shaftportion and its support. I

2. In a portableboring machine, a boring bar provided with a shaftportion ateach end, supports for eachend of the bar, and a ball andsocket joint connection and adjusting mechanism between each shaftportion and its support for changing the position of the same in alateral direction relative to the axis of theshaftb v 3. In a portableboring machine, a boring bar provided with a shaft portion at each end,supports for each end of the bar, horizontally and vertically adjustingmeans 'on each support, and a ball and socket joint connection betweeneach horizontally and vertically adjusting means and the support. j

a. A portable boring machine having supports, a boring bar, adjustingmeans on the supports for carrying the bar comprising bearings at eachend of the bar'for carrying the respective ends, means at each end formoving the bearings horizontally and independent means at each end formoving the bearing vertically relative to the supports and connectionsbetween each of the bear ings and its support for allowing universalangular moveme'ntof the bearings relative to the supports. I p

5. A portableboringmachine having supports, a boring bar, adjustingmeans on the supports for carrying the bar comprising means at each endofthe bar for carrying the respect ve ends in horizontal directions, and

'nuts43 and Mare tightened. It will be clear I means for carrying therespective ends in ing means, and a single means at each end for movingthe vertically carrying .means and a connection, between the boring barand its end-carrying means, to give a free &

movement to the boring bar bearing with relation tov its adjusting meanswhen the horizontal and vertical adjustments are made.

6. A portable boring machine having sup ports a boring bar, adjustingmeans on the supports for carrying the bar comprising means at each endof the bar for carrying the respective ends in' horizontal directions,and means for carrying the respective ends in vertical directions, and asingle means at each end for moving the horizontally carrying means, anda single means at each end for moving the vertically carrying means, anda spherical bearing connection, between the boring bar and itsend-carrying means, to give a free movement to the boring bar bearingwith relation to its adjusting means when the horizontal and verticaladjustments are made. I

.7. In a portable boring machine, a boring bar having a shaft portion ateach end, a journal member supporting each shaft portion, .asphericalcbearing portion on each journal member, a carrying member foreach journal member and having bearings complementary to thesphericalbearing portions, and separate means for adjustably supporting the:carrying members.

8. In a portable boring machine, a boring bar having a shaft portion atone end, a journal member supporting the shaft portion, a sphericalbearing portion on the journal member, a carrying member forthe journalmember and having a. bearing complementary to the spherical bearingportion, a support for the carrying member and iechanism for giving ahorizontal adjustment to the carrying member relative tothe support, andmechanism for giving a vertical adjustment to the carrying memberrelative to the support and single members for con.- trolling thehorizontal and vertical adjusting mechanisms, respectively.

9, In a portable boring machine, a boring bar having a shaft portion atone end, a journal member supporting the shaft portion, a sphericalbearing portion on the journal member, a carrying member for the journalmember and having a bearing com plementary to the spherical bearingportion, a single screw mechanism for giving a horizontal adjustment tothe carrying member relative to the support, and a single screwmechanism for giving a vertical adjustment to thecarrying memberrelative to the support.

10. In a portable boring machine, a boring bar having a shaft portion atone end, a journal member supporting the shaft portion, a sphericalbearing portion on the journal member, a carrying member for the journalmember and having a. bearing complementary to the spherical bearingportion, the carrying member and a single screw mechanism for giving ahorizontal adjustj ournal, member, a carrying member for each,

journal member and having bearings complementary to the sphericalbearing portions, supports for the respective carrying members andmechanisms for giving horizontal adjustment to the carrying membersrelative tothe respective supports, and mechanisms for giving verticaladjustment to the carrying members relative to the respective supports.

12. In a portable boring machine, a boring bar. having a shaft portionat each end, a journal member supporting each shaft portion, a sphericalbearing portion on each journal member, a carrying member for eachjournal member and having bearings complementary to the sphericalbearing portions, supports for the respective carrying members and screwmechanisms for giving horizontal adjustment to the carrying membersrelative to the respective supports, and screw mech anisms for givingvertical adjustment to the carrying members relative to the respectivesupports.

13. In a portable boring machine, a boring bar provided with a "shaftportion at each end. supports for each end of the bar, vertically andhorizontally guided carriages carried by the supports and connectionsbetween the shaft portions and one of the carriages of the respectivesupports, a single operating adjusting element for moving each carriageat each end with relation to the respective supports, and a ball andsocket connection between each shaft end and one of the carriages oneach support.

14. A boring machine having a boring bar, the boring bar having a shaft,a housing mounted to revolve about the said shaft of 'the boring bar, asecond shaft mounted in the housing at an angle to the first mentionedshaft and having a gear connection therewith and a power shaft engagingmeans on the end of the second mentioned shaft.

15. A boring machine having a boring bar, the boring bar having a shaft,a power shaft engaging means on the end of the shaft and in linetherewith, a housing mounted to revolve about the said shaft of theboring JOSEPH STAEMPFLI.

